ExpertEasy1 markMultiple Choice
AQA GCSE · Question 04 · Data Collection and Sampling Methods
Which of these sample sizes from a large population gives the most reliable sample?
Choose your answer.
Which of these sample sizes from a large population gives the most reliable sample?
Choose your answer.
Answer options:
A.
10
B.
20
C.
100
D.
500
How to approach this question
Consider the relationship between sample size and reliability. A reliable sample is one that is likely to be representative of the population. Think about whether a larger or smaller sample is more likely to reflect the characteristics of the whole population.
Full Answer
D.500✓ Correct
In statistics, a larger sample size generally leads to a more reliable and accurate representation of the population. This is because larger samples are less affected by random chance and outliers, and they tend to have a smaller margin of error. Of the options given (10, 20, 100, 500), 500 is the largest sample size and will therefore provide the most reliable results when sampling from a large population.
Common mistakes
✗ Thinking that a smaller sample might be better for some reason, for example, easier to manage. While true, ease of management does not equate to statistical reliability.
Practice the full AQA GCSE Statistics Foundation Tier Paper 1
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